All those that claim this market belongs to China, Tesla already has production in China, and can use all the same benefits Chinese companies can. Including government subsidies.
Outside companies almost never get the same benefits as local ones, that's true even outside of china. Another thing is that china has national interests in chinese carmakers.
Tesla needs to make a certain substantial profit margin, same problem as Apple's car project. BYD will sell at a loss for years to monopolize like Amazon/Walmart etc.